关于深静脉置管术，正确的是（）

A.血液净化不属于深静脉置管的指征

B.锁骨下静脉置管术应采用头高肩低位

C.右侧胸膜顶及肺尖较左侧低，故多取右侧颈内静脉穿刺置管

D.同侧锁骨骨折不属于锁骨下静脉置管术禁忌证

E.股静脉置管留置时间较锁骨下静脉长

— How are you getting along with your study these days?

— I'm glad to see it is         .

A．turning up

B．turning out

C．picking up

D．picking out